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公开(公告)号：US1646299A
公开(公告)日：1927-10-18
申请号：US75830324
申请日：1924-12-26
Applicant: LEO MANDRY
Inventor： LEO MANDRY
IPC: D06F1/08
CPC classification number: D06F1/08 , D06F39/008
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